基于点迹特征的气象杂波抑制技术

Technology of Meteorological Clutter Suppression Based on Plot Characteristic

对空情报雷达在复杂环境中经常遭受各种杂波的影响,主要包括地杂波与气象杂波等等。地杂波主要会对较低空域的目标造成掩盖、产生虚警,一般采用合适的MTI、MTD结合杂波图等杂波抑制手段即可以较有效地抑制;而气象杂波主要会影响较高空域目标的探测,由于通常处于运动状态、杂波谱较宽等因素,较难抑制。针对此问题,提出一种基于点迹特征的气象杂波抑制技术,首先对已检测点迹进行幅度归一预处理,然后利用实测数据分析出气象杂波与目标点迹在幅度起伏和速度上具有较大差异,根据幅度均值、方差和速度等特征优化合适的分类器参数,对满足气象特性的航迹进行剔除。结果验证了所提方法的有效性。

Air intelligence radar is often effected by various clutter in complex environment,including ground clutter and meteorological clutter,and the former will mainly cover target at lower altitude,and generate false alarm,which can be suppressed effectively by using appropriate clutter suppressing means like MTI and MTD combining clutter map; and the latter will effect detecting target at higher altitude which is difficult to be suppressed due to moving status of clutter and wider clutter spectrum.Aiming at this issue,a meteorological clutter suppression technology based on plot characteristic is presented.Firstly,the detected plot is performed amplitude normalization processing,and then using measured data analyzes bigger difference between meteorological clutter and target plot in amplitude fluctuation and speed.An appropriate classifier parameter is optimized according to amplitude average value,variance and speed.The track which met meteorological clutter characteristics is eliminated.The result verifies effectiveness of the presented method.